TCP attacks TCP SYN attack: This attack begins as a normal TCP connection, the client and server exchange information in TCP packets. A client sends an ACK packet to the server requesting a connection. The server will respond with a packet acknowledging the connection and then the data transmission may continue as normal. But in … Read more
There are various tricks for programming on Linux. One useful trick is to open a file for reading with C. This is how to do this. The “r” option for fopen() will read the file into memory. #include <stdlib.h> #include <stdio.h> int main(void) { FILE *f; char buf[256]; f = fopen("/etc/hosts", "r"); if(f) … Read more
The old Gconf framework allowed a user to set various options for the Gnome 2 desktop with a command-line utility or the GUI. But nowadays, we have another one. The gsettings framework for modern desktops allows a user to set various options with the terminal. This is a nice way of setting various options all … Read more
To install Docker on Ubuntu, we need to be able to add a custom repository. This is the command required. 4.4 Mon Dec 23 jason@Yog-Sothoth 0: $ sudo add-apt-repository \ "deb [arch=amd64] https://download.docker.com/linux/ubuntu \ $(lsb_release -cs) stable"4.4 Mon Dec 23 jason@Yog-Sothoth 0: $ sudo add-apt-repository \ "deb [arch=amd64] https://download.docker.com/linux/ubuntu \ $(lsb_release -cs) stable" Then update … Read more
The security of WIFI networks is getting better, but they still need work. Many routers with the default configuration have settings for WPS that limit the number of tries for each PIN attempt. But it is still possible to de-authenticate a user on the Wireless network and then capture a WPA handshake that can be … Read more
Scanning a Linux system for vulnerabilities can be a lot of fun. I have used Nessus to find SSH vulnerabilities like Heartbleed. I was doing penetration testing on a Linux machine and I found a Heartbleed bug. Vulnerability Explanation: The installation of OpenSSL on the Linux webserver was found to be vulnerable to the Heartbleed … Read more
This is a very simple, but nice shell prompt. PS1="\[\033[38;5;49m\]\w\[$(tput sgr0)\]\[\033[38;5;15m\]:\[$(tput sgr0)\]\[\033[38;5;43m\]\h\[$(tput sgr0)\]\[\033[38;5;15m\]@\[$(tput sgr0)\]\[\033[38;5;39m\]\u\[$(tput sgr0)\]\[\033[38;5;15m\]:\$?:\\$\[$(tput sgr0)\]"PS1="\[\033[38;5;49m\]\w\[$(tput sgr0)\]\[\033[38;5;15m\]:\[$(tput sgr0)\]\[\033[38;5;43m\]\h\[$(tput sgr0)\]\[\033[38;5;15m\]@\[$(tput sgr0)\]\[\033[38;5;39m\]\u\[$(tput sgr0)\]\[\033[38;5;15m\]:\$?:\\$\[$(tput sgr0)\]" This is what it looks like. /home/robert/Desktop:mycomputer@mario:0:$/home/robert/Desktop:mycomputer@mario:0:$ Another nice bash shell prompt. PS1="-\t– \u@\h [\w]\$ "PS1="-\t– \u@\h [\w]\$ " It looks like this. Not as good, but simpler than the above example. -12:01:11– … Read more
To get a nice Christmas themed Linux desktop, install xsnow. jason@jason-virtual-machine:~$ sudo apt install xsnowjason@jason-virtual-machine:~$ sudo apt install xsnow Then run it in a terminal to make your desktop snow. jason@jason-virtual-machine:~$ xsnow & exitjason@jason-virtual-machine:~$ xsnow & exit This is what it will look like. It even has a nice snow drift on the taskbar. Very … Read more
Support for Windows 7 is ending in 2020. it will show a full-screen dialog explaining the risks of continued use after this time. This is the risk of running Windows, but it is also a problem if a user had an older version of Linux installed and did not install any updates. But Windows 7 … Read more
It is possible to download just the audio from a Youtube video. This is very easy. Use youtube-dl to view information about the Youtube video and find the m4a audio track. 4.4 Sat Dec 07 jason@Yog-Sothoth 0: $ youtube-dl -F https://www.youtube.com/watch?v=JWPe9uh7FWU [youtube] JWPe9uh7FWU: Downloading webpage [youtube] JWPe9uh7FWU: Downloading video info webpage [youtube] JWPe9uh7FWU: Downloading js … Read more
This very old UNIX source code from 1979. This is source code for the Bourne shell. This code looks alien compared to modern C code, I wonder if it would even compile on a modern machine. Have a look here: https://minnie.tuhs.org/cgi-bin/utree.pl?file=V7/usr/src/cmd/sh/expand.c. But I installed all the include files and it would not compile on Kali … Read more
I have been researching a system for deploying a database cluster. I have chosen the Microsoft SQL Server product. This does support server clustering and uses nodes clustered together on a network to create a failover network that will automatically maintain operation if one node is to fail. A virtual network of database nodes spread … Read more
Installing and setting up SSH on Kali Linux 2019 is very easy. This enables an SSH connection from Bitvise SSH Client into a VMWare instance of Kali Linux. Firstly, install the SSH service. root@kali:~# apt install sshroot@kali:~# apt install ssh Then, once it is installed, start the SSH service on your Kali instance. root@kali:~# systemctl … Read more
The latest Kali Linux distribution release offers a script that will skin the Linux Gnome desktop to look just like Windows 10 by running a simple command. This means that you can pretend to be running Windows, but actually be using Kali Linux. Run the script again to change back to the default Kali desktop. … Read more
The Social Network movie featured a KDE 2.2 desktop and a nice Linux Konsole command line terminal. He is listing connections by viewing a log file with the watch utility. This also shows the Emacs text editor to edit the PHP code for his little project. This is a very interesting screenshot, it shows a … Read more
IceWM configuration fileUseful Linux CommandsVery Verbose ps commandBlackbox ThemeGNU/Linux CD Burning: (Updated! for Debian Linux 6.0.)CD Burning with BraseroWriting Ghost Images to CD IceWM configuration file My ICEWM preferences file. from $HOME/.icewm/preferences. This file has a nice friendly time format and a good Win95 styled theme. This IceWM configuration file will give you a familiar … Read more
Linux can be used to create a nice filesystem inside a file. This can be used to store data on it. This could be used as a bootable filesystem, or whatever you wish. Firstly, run this command to create a 512-megabyte file system. 4.4 Tue Nov 26 jason@Yog-Sothoth 0: $ dd if=/dev/zero bs=1M count=512 > … Read more
To convert a MIDI file to OGG on Linux, use the LMMS music-making application. Import a MIDI file by opening the Import menu. This is the Project->Import menu option. Then export the MIDI file to an OGG format file with default settings. This will create a very high-quality rendering of a MIDI file, this uses … Read more
Using SSH is a very good way to connect to another computer that is running Linux, it is also possible to mount a folder on the remote machine over a network and access it on your local computer. This is a very good way to access remote files. Firstly, install sshfs. 4.4 Thu Nov 21 … Read more
It is still possible to find anything on the Internet. Backups of websites containing passwords and information. It is all out there, and not everyone is getting the message that this is a bad idea. This could be used to harvest e-mail addresses and decrypt passwords. Do not store website backups in publically accessible directories. … Read more